Liquid crystal display device
AssigneeBoe Hydis Technology Co., Ltd.
InventorsHwa Jeong Lee, Yong Il Kim
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Abstract
Disclosed is a liquid crystal display device which is capable of adjusting a contrast ratio by transforming and outputting input data of a reference voltage circuit. Analog voltage signal generator stores an input synchronous signal and a plurality of input digital data signal in response to a write enable signal, and converts the stored digital data signal into a plurality of analog voltage signal pairs in response to an output enable signal. A plurality of reference voltage generators divide a boosted source voltage according to the analog voltage signal pairs from the analog voltage signal generator to generate a plurality of reference voltages. A source driver integrated circuit receives the plurality of reference voltages from the plurality of reference voltage generators.
Claims4
A liquid crystal display device comprising:
- an analog voltage signal generator storing an input synchronous signal and storing a plurality of data values, which represent a plurality of input digital data signals in response to a write enable signal, said analog voltage signal generator also converting stored digital data signals into a plurality of different analog voltage signal pairs in response to an output enable signal;
- a plurality of reference voltage generators for dividing a boosted source voltage according to the analog voltage signal pairs from the analog voltage signal generator to generate a plurality of reference voltages;
- and
- a source driver circuit for receiving the plurality of reference voltages from the plurality of reference voltage generators,
- wherein a digital/analog converter of the analog voltage signal generator changes a reference voltage value and outputs a changed value reference voltage to the reference voltage generators, to thereby change a contrast ratio according to changed reference voltage values when a command to change a reference voltage value is transferred to the digital/analog converter.
Dependencies are inferred from the claim text.